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3.6 Acid Deposition Needs for Additional Research

To address the indirect impacts of nitrogen and sulfur deposition that lead to soil and vegetation degradation in high-elevation spruce-fir and hardwood forests, continued intensive monitoring, modeling, and validating of acid deposition and nutrient cycling processes must occur across local and regional scales. Monitoring efforts should be supplemented with long-term regional experiments (>5 years) in which realistic acid deposition effects on soil chemical properties and stream quality are evaluated (McNulty and others 1996).